1242251764 has 24 divisors (see below), whose sum is σ = 2404445288. Its totient is φ = 557850240.

The previous prime is 1242251741. The next prime is 1242251771. The reversal of 1242251764 is 4671522421.

It can be written as a sum of positive squares in 4 ways, for example, as 101163364 + 1141088400 = 10058^2 + 33780^2 .

It is a super-2 number, since 2×1242251764² = 3086378890322223392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320907 + ... + 324754.

Almost surely, 2^1242251764 is an apocalyptic number.

It is an amenable number.

1242251764 is a deficient number, since it is larger than the sum of its proper divisors (1162193524).

1242251764 is a wasteful number, since it uses less digits than its factorization.

1242251764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645715 (or 645713 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 1242251764 is about 35245.5921215689. The cubic root of 1242251764 is about 1074.9869878360.

The spelling of 1242251764 in words is "one billion, two hundred forty-two million, two hundred fifty-one thousand, seven hundred sixty-four".